Ice-cream freezer.



BUTLER &.J'. A; ABBOTT. ICE CREAM FREEZER. APPLICATION FILED DEC. 2,190$.

Patented Jan. 10,1911.

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Patented Jan. 10,1911

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- NITED STATES PATENT JAMES D. BUTLER, CHARLES E. BUTLER, AND JULIAN A.ABBOTT, OMAHA,

NEBRASKA.

ICE-CREAM FREEZER.

Specification of Letters Patent.

Patented J an. 10, 1911.

To all whom it may concern:

Be it known that we, JAMEs D. BUTLER, CHARLES E. BUTLER, and JULIAN A.ABBOTT, citizens of the United States, residing at Omaha, in the countyof Douglas and State of Nebraska, have invented certain new and usefulImprovements in Ice-Cream Freezers, of which the following is aspecification.

Our invention has for its object certain improvements in that class ofice cream freezers which consist of a horizontal rotatable cylindercontaining the freezing agent, in combination with a cream-receivingpan, feeding rollers, and a scraper to remove the ice cream as made intoa receptacle.

Our invention particularly relates to improvements in means for tiltingthe creamholding pan so that the cream-applying roller thereon may bebrought into contact with the surface of the freezing cylinder orremoved therefrom, thus permitting the cream to be applied to thefreezing cylinder, or not applied,-as desired, and also permitting theregulation of the pressure with which the applying roller is forcedagainst the freezing cylinder.

For a full understanding ofthe invention and the merits thereof, and toacquire a knowledge of the details of construction, reference is to behad to the following description and accompanying drawings, in which:

Figure l is a longitudinal vertical section through the freezer, thecream tray and the receiving can, the freezing cylinder being shown inelevation; Fig. 2 is a plan view of Fig. 1; and, Fig. 3 is a detailperspective view of the cream pan.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

Referring to these figures, 2 designates a box or casing of any desiredsize and having the covering section 3 which is preferably shorter thanthe box 2 and is provided in its forward end with the pane 4 whereby thecondition of the frozen cream upon the surface of the freezer may beobserved. The forward end of the box is provided with the removable door5. The rear end of the box is provided with an opening 6 for thereception of a filling spout 7, and is also provided with the opening 6through which projects the means for adjusting the pan, as will be laterdescribed.

Mounted in trunnions in the upper edge of the box 2 is the freezingcylinder 8. This cylinder may be constructed in any suitable manner, andas these cylinders are well known, we have not deemed it necessary todescribe the construction specifically. Sufiice it to say that thisfreezing cylinder is adapted to hold a freezing mixture such as salt andice. One of the trunnions of the cylinder is provided with a crank head9 whereby the freezing cylinder may be rotated.

Mounted in front of the freezing cylinder is the scraper 10 which may beof any suitable construction, which is preferably made with the opposedwings 11, and is mounted upon the transverse rocking bar 12 whichprojects out through the side of the box and is there provided with thecrank handle 13 whereby the scraper may be turned with more or lessforce against the outersurface of the freezing cylinder. is held inplace by engagement with the teeth of an arcuate rack 14:.

The scraper discharges into a receiving vessel 15 which is supported inan outer can 18 adapted to hold a freezing mixture.

Carried upon the bottom of the box 2 and rearward of the freezing can 18is the cream pan 20 which has approximately the width of the box 2 andhas the forward margin of its bottom upwardly inclined, as at 21,relatively to the main portion of the bottom, so that the pan whenfilled with cream and having therein the applying roller. 22, willnormally rest upon this marginal portion 21. Carried within the forwardend of the pan 20 is the wooden cream-applying roller 22 havingprojecting gudgeons which are received in bearing sockets 23 formed onthe inside face of the sides of the pan. This roller 22 is mounted so asto freely revolve in the pan when it is brought in contact with thesurface of the freezing cylinder 8.

In order to provide a fulcrum upon which the pan may rock so that theroller 22 may be raised against the freezing cylinder or loweredtherefrom, we attach to the bottom of the pan the concavo-convex plate25 which is preferably soldered to the bottom of the pan and has thecentral opening 26. Pro jecting upwardly from the bottom of the box is apin 27 which is adapted to be in- The crank arm sorted in the opening 26so that when the pan is lowered into place in thebottom of the box 2,the pin 27 will project up from the opening 26 and contact with thebottom of the cream pan, thus forming the fulcrum upon which the panwill freely rock. It will be seen thatthis fulcrum not only permits thecream pan to rock in a plane extending longitudinally of the freezer,but also permits the pan to rock laterally. It will [also be seen thatthis forms an eX tremely cheap manner of manufacturing the fulcrum forthe pan 22,one which may be readily. kept clean, and a fulcrum ofextreme simplicity, and that when the pan is placed with the pinprojecting up into the socket formed by the plate 25, the pan cannotslip from its position.

Projecting from the rear edge of the pan is the slightly resilienthook-shaped loop 28 which projects out through the opening 8 in the rearend of the boX 2 and is adapted to be engaged with any one of aplurality of pins or projections 29 which extend from the rear wall. 'Byengaging the loop 28 with one or the other of these projections, it willbe obvious that the 'roller 22 will be brought with more or less forceagainst the face of the freezing cylinder. It is also to be noted thatbecause of the fact that the pin-like'fulcrum permits the cream pan torock laterally, the roller will be adjusted so to contact with thefreezing cylinder across its entire face. Thus there is no chance of oneportion of the roller contacting with the cylinder while the otherportion is separated therefrom. This is obviously a very important pointin the effective use of this form of-ice cream freezer. It is to beremembered that the pan 22 is usually of tin or otherlike metal which isvery liable to become bent in use, and which has 'a certain degree offlexibility, and that thus some means should beprovided for permittingthe pan to tilt laterally as well as forwardly and rearwardly to bringthis rollerinto contact with the freezing cylinder along its entireface, as above described.

The operation of our machine is evident.

The pan 20 is to be filled with cream and placed upon the bottom of thecasing 2. The wooden roller at the forward end of the pan and "the creamin the pan tend to lift the rear end of the pan so that the roller 22 isout of contact with the freezing cylinder. The receptacle 15 is now putin place, the freezing cylinder lowered into position, and the top ofthe casing closed. By drawing downward uponthe loop 28, the rear end ofthe cream pan will be lowered and the roller 22 brought in contact withthe face of the freezing cylinder. By now rotating the freezingcylinder, a thin film of cream will be applied thereto from the roller22, and will be frozen upon the face of the cylinder.

-W hen the frozen cream has reached a proper thickness,-the scraper ismoved into more or less close contact with the face of the freezingcylinder, and the further rotation of the cylinder will scrape thefrozen cream into the receptacle 15.

The advantages of our improvements particularly lie in the cheapening ofthe construction; the greater simplicity of the several parts, andparticularly in the fact that, as before stated, the roller will contactwith the face of the freezing cylinder along its whole extent when thecream pan is forced downward at its rear end, due to the peculiar formof support used.

Another important advantage gained by the use of the wire loop 28 isthat the loop is so shaped as to be elastically yielding or resilient,and hence the roller 22 is allowed to run smoothly over the cylinder 8,even though the cylinder be not exactly round, or the surface thereof benot exactly even. The devices previously used for the purpose of holdingthe roller 22 to the freezing cylinder have been so rigid asto hold theroller against the cylinder with more or less rigidity, and hencethecream has not been applied evenly to the surface of the cylinder.

Having thus described the invention, what is claimed as new is 1. In anice cream freezer of the character described, an outer casing having abottom, a rocking tray having a cream-applying roller at its forwardend, the bottom of the outer casing being provided with an upwardlyprojecting pin circumferentially rounded at its upper end and the trayhaving a socket on its under side into which the pin loosely extends,said socket being so formed as to permit the socket to have any angularrelation to the pin.

2. In an ice-cream freezer of the character described, an outer casing,a cream tray located within the casing and movable therein, a pin havinga rounded upper end projecting upward from the bottom of the easing andforming the fulcrum for the tray, and a hemispherical hollow shellattached. to the bottom of the tray and forming a socket into which therounded end of the pin projects.

3. In an ice-cream freezer of the character described, the combinationwith an outer casing having an opening in its rear end, of a cream traywithin the casing having rocking engagement with the bottom of theeasing, said tray having a loop extending out through the opening in therear end of the casing whereby the front end of the tray may be raised,a plurality of rearwardly projecting studs on the casing with which saidloop engages, and a cream-applying roller on the front end of the creamtray.

4;. In an ice cream freezer, an outer casing, a rotary freezing cylindermounted in the casing, a cream tray located below the freezing cylinder,said tray having a downwardly projecting pin forming a fulcrum for thetray and engaging with the bottom end raised and its roller inengagement with the freezing cylinder.

In testimony whereof we aflix our signatures in presence of twowitnesses.

5 of the casing, the rear end of the tray being JAMES D. BUTLER. [11.s.] formed with a hook-shaped loop extending CHARLES E. BUTLER. [L.S.]out from the opening in the rear end of the JULIAN A. ABBOTT. [L.S.]casing and a projection on the rear end of Witnesses:

the casing with which said hook-shaped loop I CHAS. I. ROWE, 10 engagesto hold the tray with its forward H. W. THOMPSON.

